Frequently asked questions

SevenSound designs and manufactures professional loudspeakers, amplifiers and control software for permanent audio installations.

The range is aimed at permanent installs in spaces such as bars, restaurants, retail, gyms, clubs and events.

Four categories: Loudspeakers (point-source, full-range and subwoofer cabinets), Electronics (D-class amplifiers, processors and DSP controllers), Software (Windows-based setup, tuning and live control for the electronics range) and Accessories (rack hardware, controllers and mounting solutions).

Yes — selected models are available in a custom colour finish through the Nuance line. Pick a model and a finish on the Nuance page.

Use the system calculator under Concepts: tell it your sector and floor area and it sizes the loudspeakers, subs and amplifiers for you.

The 3D room visualizer then lets you place everything in the room and outputs a bill of materials and an auto-generated wiring plan, which you can download as a PDF.

Where a 3D model is available, the product page shows it in an interactive viewer with an AR launcher on supported iOS and Android devices. Nuance models also let you preview a custom colour live in the browser.

Use the contact form to tell us about your room, or email sales@sevensound.nl directly. Product and concept pages also have a "Request a quote" button that pre-fills your selection.

Impedance is the load a loudspeaker presents to the amplifier, expressed in ohms (Ω). The lower the impedance, the more current the amplifier has to deliver and the more power it puts out.

Every loudspeaker lists its impedance in the spec table on its product page — for example 16 Ω for the XR4, XR5 and Tune 1, and 8 Ω for the XR8, XT6, XT10, XB12 and XB15.

With identical loudspeakers you divide the impedance by the number of cabinets: Z total = Z ÷ count. Two 16 Ω loudspeakers in parallel give 8 Ω, four 16 Ω give 4 Ω, and two 8 Ω give 4 Ω.

With different impedances the rule is 1/Z total = 1/Z1 + 1/Z2 + … An 8 Ω and a 16 Ω cabinet together come out at roughly 5.3 Ω.

You wire in parallel by connecting all plus terminals together and all minus terminals together. With NL4 cabling you loop from cabinet to cabinet on the same conductor pair (1+/1−).

As many as fit above the amplifier’s minimum load, which is 4 Ω per channel on our install amplifiers. In practice that means up to four 16 Ω cabinets (XR4, XR5, Tune 1) per channel, or up to two 8 Ω cabinets (XR8, XT6, XT10).

Below 4 Ω the amplifier is overloaded: it goes into protection or takes damage. The 3D visualizer works this out for you and flags any channel that drops under the limit.

Because the amplifier delivers more current into a lower impedance. As a rule of thumb, halving the impedance roughly doubles the power: P(Z) ≈ P(8 Ω) × 8 ÷ Z. That is why the CA4-800D is rated 4 x 100 W at 8 Ω and 4 x 200 W at 4 Ω.

Keep in mind that this power is shared by every loudspeaker on that channel. Two 8 Ω cabinets in parallel on a 4 Ω channel of 200 W each receive about 100 W.

Each loudspeaker lists two figures in its specifications: AES power (what the cabinet handles continuously) and Rec. amplifier (the amplifier power we recommend). The recommendation is deliberately higher than the AES figure, so there is headroom for peaks and the amplifier does not clip — clipping damages a loudspeaker faster than a generously rated amplifier does.

The XR5, for example, is rated 120 W AES with a recommended amplifier power of 600 W at 8 Ω. The system calculator under Concepts picks amplifiers on the basis of these figures.

No. On a 100V line — the CL-5T, for instance, with taps of 30 W, 15 W, 5 W and 2.5 W — you do not work in ohms. You add up the tap settings of all loudspeakers on the line and keep that total below the rated power of the 100V amplifier, with some margin to spare.

All loudspeakers hang in parallel on one line, and the tap you select sets the level of each individual cabinet.